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Sum of differences

  1. #1
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    Sum of differences

    Hello all,

    Excuse me if I am in breach of any etiquette by posting this here (I am somewhat new to this site) -let me know if I am.

    I have a question on summing absolute differences, I am looking for a slightly more elegant solution than the one I have currently

    =SUM(ABS(C$73-C$72),ABS(C$72-C$71),ABS(C$71-C$70),ABS(C$70-C$69),.....

    Please note, I'm not trying to sum absolute differences between each pair in the range, only differences between adjacent pairs

    Any help/guidance much appreciated!
    Thanks
    Last edited by Imprisoning; 03-25-2011 at 08:13 AM.

  2. #2
    Forum Expert NBVC's Avatar
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    Re: Sum of differences

    Something like:

    =SUMPRODUCT(--(ABS(C70:C73-C69:C72)))
    Where there is a will there are many ways.

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  3. #3
    Forum Guru DonkeyOte's Avatar
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    Re: Sum of differences

    It would help if we knew the full range but assuming say C50:C73 then

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    above assumes no non-numerics in the range - adjust as necessary.

  4. #4
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    Re: Sum of differences

    Thank you very much for this. It looks like it's working perfectly.

    May I ask what the double "--" is doing/

    Thanks also to DonkeyOte - I do need the range to be adjustable, which is why I left the question open-ended, but it seems you have both come up with similar solutions, so thanks for the help

  5. #5
    Forum Expert NBVC's Avatar
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    Re: Sum of differences

    Actually, the -- is not needed here. It is usually used to coerce TRUE/FALSE results to 1s and 0s... It was an involuntary introduction that didn't change the result

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